The value of AS°

Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter16: Spontaneity, Entropy, And Free Energy
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Problem 2RQ: What is the second law of thermodynamics? For any process, there are four possible sign combinations...
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The value of AS° for the formation of POC13 from its constituent elements,
P2 (g) + 02 (g) + 3C12 (g) → 2POC13 (g)
is
J/K · mol.
Thermodynamic Quantities for Selected Substances at 298.15 K (25 °C)
Substance
AH°f (kJ/mol) AG°† (kJ/mol) S (J/K-mol)
C12 (g)
02 (g)
222.96
205.0
P2 (g)
144.3
103.7
218.1
РОС13 (9)
-542.2
-502.5
325
O -442.0
O +771.0
O -321.0
O -771.0
Transcribed Image Text:The value of AS° for the formation of POC13 from its constituent elements, P2 (g) + 02 (g) + 3C12 (g) → 2POC13 (g) is J/K · mol. Thermodynamic Quantities for Selected Substances at 298.15 K (25 °C) Substance AH°f (kJ/mol) AG°† (kJ/mol) S (J/K-mol) C12 (g) 02 (g) 222.96 205.0 P2 (g) 144.3 103.7 218.1 РОС13 (9) -542.2 -502.5 325 O -442.0 O +771.0 O -321.0 O -771.0
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